nav{
	display: flex;
}
nav li{
	display: block;
	color: white;
	background-color: blue;
	font-size: 14px;
	margin-right: 5px;
	padding-top: 7px;
	padding-bottom: 7px;
	padding-left: 15px;
	padding-right:15px;
}
section,article{
	width: 880px;
	
	border-bottom: 2px solid green;
}
footer{
	margin-top: 10px;
	width: 880px;
	text-align: center;
	font-size: 12px;
}
.w{
	width: 1028px;
	margin: 0 auto;
}
